| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rotor physical quantity measuring method and rotor physical quantity measuring device capable of accurately measuring the physical quantity if necessary regardless of the size of the rotor and the rotation speed. <P>SOLUTION: Measuring light outputted from a light source 60 is radiated from a lens 22 via an optical coupler 44, and propagates in space toward the rotor 12. The measuring light propagating in the space is condensed by a lens 24, propagates in an optical fiber 26, and comes into an optical fiber for measurement. The measuring light is reflected according to the amount of strain and generates return light in the propagation process of the optical fiber. The return light propagates in the optical fiber 26 in the opposite direction of the measuring light, is radiated from the lens 24, and propagates in the space toward the fixed side. The return light propagating in the space is condensed by the lens 22 and comes into a measuring section 70 via an optical coupler 44. The measuring section 70 measures intensity variation of the return light with time, and calculates the amount of strain. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
